What is the half life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours

Energy is the ability to do work which measures what

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers